Liquid-fuel supply device for internal-combustion engines



March 31. 1925. 1,531,424

. F. A. SMITH LIQUID FUEL SUPPLY DEVICE FOR INTERNAL GOMBUSTION ENGINESFiled Aprii 16, 1924 "Il I alf 6 10 Patented Mar. 31, 1925.

Ueii'iE-o Sr-TA-Ji-E-S PATENT Fei-ee.

"FBEEEBICK ETHER Si-Mi OEBB-SEDLLENGLSND- l Application lxedApIl 16,192,4.

Sina-I, a subject-eli;y tlie King OEi-igland,

i'eadi'ng at Bras-ted, blie-nt,Y Englandyliave inventedeeii'ain newandusefull-improven'ients in Liquid-Fuelj Supply Devices *forinternalflConibuSti-oii Eii-gjiiee. f

This invention is for improvements inet i'elating toliquid fuel supplydevices` for-inteifnalfcombustionengines` andfliasg fon-itsniai'n'object to provide;A a: silinplef iioilmofl de vice for;supp-lying a/ priming -eli-aigeof liqaid uel te the engine*foro-Starting' puiposes. Anotlieiobject "of 'the invention'ietopprov'ide means A-Wlieielay a primingcli-aigel-of liquid i'guel4Valone i's'f folleivedl'by a-combusti- -lile mixture of fuel- -andai12-or4 a-i'n Aa-lo ne, independentlyof vor -inconjunction-Withfthe iii-ainfuel Supply. The present invention also a-iins at Vprovid-ing simplesdevice-[Which is-desiggned as an attachment for-usegwitli an o-d-inaiyCarburettor.

Accordingt0 a' primary feature of @the present invention*there-isprovided a device foifjthc purpose above. set' forth comprising a:-ifeSei1voii-condui`t lia-ving an a-i'ri inlet-at one endl, means at'tlieother end' foi' attachniegnt to an' eng-ineinduction-pipetocoinnu,-u-'nicate therewith at one orginele-,points therein*(pn-'theengi-ne side oftlietlu'ottle) andi m eans suoli lasa-fuelfeedeorilicein ga-id iieserve-ii'eonduit adapted? to,l be: placed'in communication with; a# iid'ilfuel supply I( for exam-ple, the-`-iFloat-c'lianibei1r of; the, 4nia-inl cai'biu'ettoi') for, I Supplyingl-iqii-id1A iiel` to said;- reseivoiig with? or; Witl'iont (mea-nsf'i501' shutting Voli atI Wil-l communication lieti-veen thevleser-voi?-coiiduit aI-1d" the.' induction pipe.v

',fccoifding to anotherfeature.,of tlie- -i'nvention, device asdescribed.inl the preceding; paifagi'apli is 'provided---WitliA means'iol shutting eill atgivill coiiiiiiuinicati`on between the liquid-fuelsupply vra-ii-d-tliel reservoirconduit;

Conveniently, *the reservoir-condluit takes the-foimofapendentfklejubewhereof" the end Vof one-limb is open -to--t-lieai-'i-inlet and the etlieiv lii'nloA is-provi-dedY-Witlimeans lorconnection tothe eng-ineinducti'onfpipe and a Auel' `feedY ori-licecommunicates Witlr the tube L at poi-ntbelow`-tlie normall level of thesupply' liquid.

' Otlieii' features oi' the inventionr will be hereinafter describedandv pointed out intlie claims.

' Inl -theaccompanying drawings: -i-"Figuie l is al;perspectivevievvV ofone-form of' app ara-tus with parte; tliereo broken away "In ftliisIview-- the device' is sli-own fattaclied "oany-engine,- poi'tions ,of

nozzle.

front-'- elevation 'ofi -a-netliel ffee to like parte.

described,- czoinpri'eee a tubular part 6'- vv cli constitutes a7portiono' :the Areservoir-'conduit, and-'Which lei! ori-lice 7. is bell-,iontlied and constitutes- 'tlie -a-ii in- 1 M v., W Y Y 9 across the,mouth'. The oiilice -opens -i-nto tliefilter elia-lieber IQ lia-vingeuilialole; -g-agu-ze A shot-vn in*y aindtlais needle-@valve- 1GZ foncon-trolling thef flowv lof fuelltlufeiiigli thev o'iilieei 7'. The,liead of the needlevalve is inilled andas provided'` With anotch 18asceitainedv andi the clamp isl then-f tightened up. jiinjytemper-ary.adjustment ofthe-valve may aiiteiwaids be ina-de leyroeati'ngthe milled Aliead irel livelyte `the lingen-Which will alwaysindicate the permanent setting position of the valve.

In the construction shown in Figure 1, the remainder of thereservoir-conduit is constituted by the U-tube 23, one limb of which issecured to the tubular part 6 whereas the other limb carries a two-waycock 24 through which communication is made by way of the tube 25 andthe annular discharge nozzle (Figure 2) with the engine induction pipe2G. In one position of the cock the tube 25 is in direct communicationwith the atmosphere by way of the .hole 27, and in this position thetube 23 is closed to engine suction. Figure 2 shows a convenientconstruction for the discharge nozzle which comprises a union 28 screwedinto the induction pipe and having a plug 29 with a conical head 30fined therein. A number of holes 31 provide passages through the plug tothe annular space 32 between the head and the union.

With the arrangement shown in Figure l, it will be seen that fuel willaccumulate in the tube 23 until it reaches the level of the supply, whenthe engine is not running or when the cock 24 is closed. When the engineis started, the cock 24 being open, a rich priming charge is supplied tothe engine, which charge is followed by a mixture of fue-l and air afterthe fuel in the reservoir has been exhausted, because air is drawn fromthe inlet past the feed-orifice 7 and thus becomes carburetted, thedevice then functioning as a miniature Carburettor.

In the arrangement shown in Figure 3 the cock 24 is located below thefuel inlet and the reservoir is constituted by the cup 8 and the portionof tube above the cool; when this latter is closed. In this figure thefuel supply is indicated diagrammatically as coming from a smallseparate tank 33 which may contain a more volatile fuel than thatof themain supply. The supply of fuel to the reservoir can be controlled bythe needle valve 16, I7. Obviously, this arrangement may be applied toany of the constructions shown.

Figure 4 shows an arrangement of the device for starting two engines; aparticular application being to a large power plant, such as a marineengine, which has a small auxiliary engine for starting it. rIo thelower end of the part 6 of the fitting 5 two tubes 34 and 35 areattached, the small one 34 being arranged to serve the small startingengine and the-large one 35 the main engine. The tube 35 is coiled at 36so that the capacity of the reservoir formed thereby is increased whileat the same time the bore of the conduit remains constant. Above thecocli 24 the engine supply pipe 2&3 branches off to serve the inductionpipe at two points; although any number of branches may be employed asdesired. The above features are applicable to any of the constructionsaccording to the invent-ion and are particularly useful in the case oflarge engines, the latter especially where a long induction pipe isused. The fitting 5 is provided with a pair of lugs 37 to which thereservoir tube or tubes may be secured by solder or the like as shown inFigure 4. In Figure l the tube 23 is shown away from the lug forclearness. Again, in Figure 4, the air inlet is shown as provided with atube 38 through which hot air may be drawn. This arrangement isadvisable in any case where the device is intended to be used as apermanent slow running means. When used on a motor car, suitable meansmay be provided for controlling the cock from the dash.

I claim l. A priming device for an internal-combustion engine,comprising in combination a substantially continuous reservoir tubehaving an air inlet at one end and means at the other end for attachmentto the engine induction pipe to communicate therewith, liquid-fuel inletto said tube, means for supplying liquid-fuel to said inlet, and athree-way control-cock between said inlet and the induction pipe, whichin one position opens a port to admit air to the engine side of the tubeand shuts off communication between the engine and the fuel reservoir sothat air alone is admitted to the engine, substantially as described.

2. A priming device for an internal-combustionV engine, comprising incombination a substantially continuous reservoir tube having an airinlet at one end and means at the other end for attachment to the engineinduction pipe to communicate therewith in at least one point, aliquid-fuel inlet to said tube, a filter-chamber communicating with saidliquid-fuel inlet, means for supplying liquid-fuel to saidfilter-chamber, and a control-cock between said inlet and the inductionpipe adapted to shut off communication therewith, substantially asdescribed.

3. A priming device for an internal-combustion engine, comprising incombination a substantially continuous reservoir tube having an airinlet at one end and a spray nozzle at the other end adapted tocommunicate with the engine induction pipe, a liquid-fuel inlet to saidtube, a filter-chamber communicatng with said liquid-fuel inlet, meansfor supplying liquid-fuel to said filter-chamber to iiood the tube whennot under the influence of suction, a regulating valve adapted tocontrol said liquid-fuel inlet, and a three-way control-cock betweensaid inlet and the induction pipe adapted to shut off communicationtherewith andto open communication between the induction pipe and an airinlet port, substantially as described.

4. A priming device for an internal-comlijf) llO busti-on engine,comprising L in l combination a*` substantially continuousreservoir tubehaving a,removable-,cap iadapted toi, form 1 an ,airinlet ,at ,one endand lanannfidarspray nozzle; at` theol-,other end;- adapted-- ,tocominnicate with theengine inductionpipe, a liquid-.fuel inletI te `saidtube, a i-ltercliamberwcominunieati-ngwith said 1liquideiuelinlet, means.fcn s pplyin g I liquid-fuel to` said :ch-amber te. fined thetube, whennot under :the .induence; Of-zsucticnf elmeg-nl ting needle-naveadaptedltoflcentrol said uidfuel inletand a tyhree-.w-ay, contnol-cockbetweenj :said inlet andi L the, :induction pipe zal adapted; to:` shutloif-co inraunication` :therewith andl to, .open` commi the ;i ,v u ctienpipe` and-an airinlet -.port, substantie lly' as described.

5 aA priming device-forman internal-combustion enOlne, comprising incombination pendentl` U; tube. hav-ing;goneulimbwepen to` atmosphere toconstitute an 'air inlet, means at the end of the other limb forattachment to the engine induction pipe. to communicate therewith, aliquid-fuel inlet communicating with one of said limbs, and means forsupplying liquid-fuel thereto from the float chamber of the enginecarburetor, substantially as described.

6. A priming device for an internal-combustion engine, comprising incombination a pendent- U tube having one limb open to atmosphere toconstitute an air inlet, means atl the end oif the other limb forattachment to the engine induction pipe to communicate therewith, aliquid-fuel inlet communicating with one of said limbs, and a three-waycontrol-cock between said fuel inlet and the induction pipe, which inlone position opens a port to admit air to the engine side of the tubeand shuts off communication between the engine and the fuel reservoir sothat air alone is admitted to the engine, substantially as described.

7. A priming device for an internal-combustion engine, comprising incombination a pendent U tube having one limb open to atmosphere toconstitute an air inlet and an annular spray nozzle at the end of theother limb adapted to communicate with the engine induction pipe, aliquid-fuel inlet communicating with one of said limbs, means forsupplying liquid-fuel to said inlet to flood the tube when not under theinfluence of suction, and a three-way control-cock between said fuelinlet and the induction pipe adapted to shut olig communicationtherewith and to open communication between the engine and an air inletport, substantially as described.

8. A priming device for an internal-combustion engine, comprising incombination a pendent U tube having one limb open to atmosphere toconstitute an air inlet, a spray nozzle at the end of the other limbadapted cat-ion between to icommim-icate` with theiellgine ,inductionpipe, a liq-ind-fuel inletcominunicati g. with Oneof .sa-id ,-limbs, a=filter-chamber -comm-unicati-ng withsaicb inlet, mea-ns fonconnectingsaidA ilterfchalnber.,to co nu-nicate, with the float chamberofithe-,carburetor,nf tlcng-ine, and., a` tlnee-wayi 4contrqolcoclrtween lsaid fuel inlet land the induction p adapted -to-,shutcoinmunicationtl witl and; to open .communicat between, the-engineendian ,air iin-let pnrtsnbstantially. as described. L:

i 9.- .Ac priming-.device for ,an internal-combustion engine,@crimini-ng, incolubinaticn a pen dent-,- U.. itu-be` h ai with. aremouable cap, to .constitute .air inlet, a. sprayvnozzle `at theend ofthebther limb fornttachment tothe engine induction pipe y,tocommunifcatev Yctherewith, aj; liquidfuel inlet .communicating withlone, 'of.v l, ljmbs, aegiilating I,valve Yadapted to `centrlolsaid'liquidlfuel inlet, and acontrol-cck between said fuel inlet and theinduction pipe adapted to shut oli' communication therewith,substantially as described.

10. A priming` device for an internal-combustion engine, comprising incombination a pendent U tube having a perforated cap adapted to form anair inlet at one end of one limb, a spray nozzle at the end of the otherlimb adapted to communicate with the engine induction pipe, aliquid-fuel inlet in one of said limbs, a lter-chamber communicatingwith said fuel inlet, means vfor supplying liquid-fuel to saidfilter-chamber from the float chamber of the engine carburetor, aregulating valve for said fuel inlet, and a control-cock between thefuel inlet and the induction pipe adapted to shut oif communicationtherewith, substantially as described.

1l. A priming device for an internal-combustion engine, comprising incombination a substantially continuous reservoir tube having an airinlet at one end and means on the other end for attachment to the engineinduction pipe to communicate therewith in one point, a liquid-fuelinlet to said tube, a regulating valve adapted to control said fuelinlet and means for supplying liquid-fuel to said inlet, control meansoperatively connected to said regulating valve in such a manner as topermit relative movement between said valve and said control means andpro-vided with means to permit, at will, bodily movement of the controlmeans with said valve, and a control-cock between said fuel inlet andthe induction pipe adapted t0 shut oliz communication therewith,substantially as described.

l2. A priming device for an internal-combustion engine, comprising incombination a reservoir tube having one end open to atmosphere toconstitute an air inlet and means at the other end for attachment tofgfonej limb .provided the engine induction pipe to communicatetherewith, a liquid-fuel inlet communicating with said tube, a boss onsaid tube, a needle Valve having a screw-threaded engagement in saidboss and adapted to control Vsaid liquid fuel inlet, a milled head forturning said Valve, a sleeve rotatably mounted on said boss, means toclamp said sleeve to said boss, an arm secured to said sleeve andadapted to be rotated therewith vand a catch on said arm adapted toengage said milled head, substantially as described.

13. A priming device for an internal-coinbustion engine, comprising incombination a pendent U tube having` a removable perforated cap. adaptedto form an air inlet on one limb, an annular spray nozzle at the end ofthe other limb adapted to communicate with the engine induction y pipe,a liquid-fuel inlet communicating with one of said limbs, a lter-chambercommunicating with said liquid-fuel niet and' having* indicator thereon,a sleeve rotatably mount-V ed on said boss, means to clamp said sleeveto said boss, an arm secured to Said sleeve and adapted to be rotatedtherewith, a catch on said arm adapted to engage said milled head, and athree-way control-cock adapted to shut off communication between thefuel inlet and the induction pipe and to open up communication betweenthe induction pipe Vand an air inlet port in the casing of said cock,substantially as described.

In testimony whereof I aflix my signa ture. Y

FREDERICK ARTII'UR SMITH.

